To be clear, we are talking by-pass (inter-stage coupling) caps only here. Caps age with time, they are, in effect, electrical shock absorbers. I restore vintage hifi gear as a side job. Recapping is a common request. Each capacitor manufacturer uses slightly different insulating materials for...

I have been a audio/video technician for 44 years. This is a common topic. The short answer is "Yes" there is absolutely a difference in capacitors. The dielectric being a large determining factor. It is a matter of taste when "Voicing" your amplifiers/speakers as to which capacitor you pick...